Method and apparatus for performing automatic power control in a memory device with aid of associated detection during initialization phase

Abstract

A method and apparatus for performing automatic power control in a memory device are provided. The method includes: during an initialization phase of the memory device, performing signal level detection on a reference clock request signal to determine whether the reference clock request signal is at a first predetermined voltage level or a second predetermined voltage level, for performing the automatic power control for the memory device, wherein the reference clock request signal is received through an IO pad; and according to a logic value carried by an input signal of a selective regulation circuit (SRC), performing selective power control to generate a secondary power voltage according to a main power voltage, wherein the selective power control makes the secondary power voltage be either equal to the main power voltage or a regulated voltage of the main power voltage in response to the logic value carried by the input signal.